CAT93C56VIT3 Просмотр технического описания (PDF) - ON Semiconductor

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CAT93C56VIT3

2-Kb Microwire Serial CMOS EEPROM

ON Semiconductor 

CAT93C56, CAT93C57

The format for all instructions sent to the device is a

logical “1” start bit, a 2−bit (or 4−bit) opcode, 7−bit address

(CAT93C57) / 8−bit address (CAT93C56) (an additional bit

when organized X8) and for write operations a 16−bit data

field (8−bit for X8 organizations). The instruction format is

shown in Instruction Set table.

Table 10. INSTRUCTION SET

Instruction

Device Type

Start

Bit Opcode

Address

x8

x16

Data

x8

x16

Comments

READ

93C56 (Note 8)

1

10

93C57

1

10

A8−A0

A7−A0

A7−A0

A6−A0

Read Address

AN–A0

ERASE

93C56 (Note 8)

1

11

93C57

1

11

A8−A0

A7−A0

A7−A0

A6−A0

Clear Address

AN–A0

WRITE

93C56 (Note 8)

1

01

93C57

1

01

A8−A0

A7−A0

A7−A0

A6−A0

D7−D0

D7−D0

D15−D0

D15−D0

Write Address

AN–A0

EWEN

93C56 (Note 8)

1

00

11XXXXXXX 11XXXXXX

Write Enable

93C57

1

00

11XXXXXX

11XXXXX

EWDS

93C56 (Note 8)

1

00

00XXXXXXX 00XXXXXX

Write Disable

93C57

1

00

00XXXXXX

00XXXXX

ERAL

93C56 (Note 8)

1

93C57

1

00

10XXXXXXX 10XXXXXX

00

10XXXXXX

10XXXXX

Clear All

Addresses

WRAL

93C56 (Note 8)

1

93C57

1

00

01XXXXXXX 01XXXXXX D7−D0 D15−D0

Write All

Addresses

00

01XXXXXX

01XXXXX

D7−D0 D15−D0

8. Address bit A8 for 256x8 organization and A7 for 128x16 organization are “Don’t Care” bits, but must be kept at either a “1” or “0” for READ,

WRITE and ERASE commands.

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